<template>
  <el-container class="home-container">
    <!--头部区域-->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout()">退出</el-button>
    </el-header>


    <el-container>
      <!--侧边栏区域-->

      <el-aside :width="isCollapse?'64px':'200px'">
        <div class="toggle-button" @click="toggleCollaspse">|||</div>

        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409eff" :unique-opened="true"
          :collapse="isCollapse" :collapse-transition="false" :router="true" 
          :default-active="activePath">

          <!--一级菜单-->
          <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
            <!--一级菜单的模板区域-->
            <template slot="title">
              <!--图标-->
              <i class="el-icon-location"></i>
              <!--文本-->
              <span> {{ item.authName }} </span>
            </template>
            <!--二级菜单-->
            <el-menu-item :index="'/'+subItem.path" v-for=" subItem in item.children" :key="subItem.id"
              @click="saveNavState('/'+subItem.path)"
              >
              <template slot="title">
                <!--图标-->
                <i class="el-icon-menu"></i>
                <!--文本-->
                <span> {{ subItem.authName }} </span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>

      <!--右侧主体区域-->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
  export default {
    created() {
      this.getMenuList()
      this.activePath=window.sessionStorage.getItem('activePath')
    },
    data() {
      return {
        menulist: [{
            'id': 101,
            'authName': '用户管理',
            'path': null,
            'children': [{
              'id': 10101,
              'authName': '用户列表',
              'path': 'users'
            }]
          },
          {
            'id': 102,
            'authName': '权限管理',
            'path': null,
            'children': [{
                'id': 10201,
                'authName': '角色列表',
                'path': 'roles'
              },
              {
                'id': 10202,
                'authName': '权限列表',
                'path': 'rights'
              }
            ]
          },
          {
            'id': 103,
            'authName': '商品管理',
            'path': null,
            'children': [{
                'id': 10301,
                'authName': '商品列表',
                'path': 'goods'
              },
              {
                'id': 10302,
                'authName': '分类参数',
                'path': 'classes'
              },
              {
                'id': 10303,
                'authName': '商品分类',
                'path': 'categories'
              }
            ]
          },
          {
            'id': 104,
            'authName': '订单管理',
            'path': null,
            'children': [{
              'id': 10101,
              'authName': '订单列表',
              'path': 'orders'
            }]
          },
          {
            'id': 105,
            'authName': '数据统计',
            'path': null,
            'children': [{
              'id': 10101,
              'authName': '数据信息',
              'path': 'datas'
            }]
          }
        ],
        //是否折叠
        isCollapse: false,
        //被激活的链接地址
        activePath: ''
      }
    },
    methods: {
      getMenuList() {
        // const{ data:res } = await this.$http.get('menus')
        // console.log(res)
      },
      //点击按钮，切换菜单的折叠与展开
      toggleCollaspse() {
        this.isCollapse = !this.isCollapse
      },
      saveNavState(activePath) {
        window.sessionStorage.setItem('activePath', activePath)
        this.activePath = activePath
        console.log(activePath)
      },
      logout() {
        window.sessionStorage.clear()
        this.$router.push('/login')
      }
    }
  }
</script>

<style>
  .home-container {
    height: 100%;
  }

  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-left: 10px;
    padding-right: 10px;
    color: #fff;
    font-size: 18px;

  }

  .el-header div {
    display: flex;
    align-items: center;
  }

  .el-header div img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #eee;
  }

  .el-header div span {
    margin-left: 12px;
  }

  .el-header .el-button {
    height: 60%;
    font-size: 15px;
    padding-top: 0px;
    padding-bottom: 0px;
  }

  .toggle-button {
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }

  .el-aside {
    background-color: #333744;
  }

  .el-aside .el-menu {
    border-right: none;
  }

  .el-main {
    background-color: #eaedf1;
  }

  .iconfont {
    margin-right: 10px;
  }
</style>
